Van Beek, Pieter 226Ra in barite: absolute dating of Holocene southern ocean sediments and reconstruction of sea-surface reservoir ages - Boulder, CO Geological Society of America August 2002 - pp. 731-734 ilus. Subjects--Topical Terms: EDADES RADIOMETRICASGEOCRONOLOGIAHOLOCENOPALEOCLIMATOLOGIASEDIMENTOS MARINOS Subjects--Geographic Terms: ANTARTIDA